Gimp is not packaged for Linux by its authors. This is done by each distro. However the Gimp authors distribute a `flatpakè version, so if you can add flatpak support to your old distro you can run any recent version of Gimp on it.
Otherwise you distro is probably based on Debian Buster so you can try to get Ubuntu or Debian archives.
Otherwise you distro is probably based on Debian Buster so you can try to get Ubuntu or Debian archives.
- https://archive.ubuntu.com/ubuntu/pool/universe/g/gimp/
- http://ftp.ca.debian.org/debian/pool/main/g/gimp/